OF LOKARNE. 4^9 



incnt is found in the water, in the form of a thin 

 purple plate. When the fediment is more co- 

 pious, the nitrous folution produces a violet co- 

 lour in the water; and when in flill greater 

 plenty, tinges it black. The calcareous earth, 

 when in no larger proportion than in the wa- 

 ters of Loknrnc, is fcparated in twenty-four 

 hours by the faccharinc acid. 



The falitcd ponderous earth intermixed in the 

 Lokarnc water difcovcrs no mark of vitriolic a- 

 cid ; nor does tinclure of galls detect the pre- 

 fence of iron. In the reiiduc, like wife, which 

 remains after the evaporation, no iron appears ; 

 unlcfs the acid employed be prcvioufly tindtur- 

 ed with iron. 



I meant likewife, had not ill health prevent- 

 ed me, to have examined the water of the old 

 and the bath fpring by evaporation. But, by 

 the ufe of reagents I found the water of thofc 

 fprings to contain the fame principles as that of 

 the new fpring, only in an inferior proportion. 

 JU'rgc obtained only two grains rcliduc for eve- 

 ry pint of the water of the old fpring. 



2. There is but very little volatile matter in 

 the water of Lokarne. 



The tallc gives no indication of the prcfence 

 of aerial acid : yet that every pint contains two 

 or three cubic inches of this aeriform fluid, ap- 

 pears from the circumftance of a red colour be- 

 ing 



